CIS407 Ilab1

1. Open Microsoft Visual Studio.

2. Create a new ASP.NET website called "PayrollSystem."

To do this, select File -> New-> Web Site

You will get the following screen which shows Visual Basic.

Select Visual C# template on the left of your screen if it is not already selected. Notice that your screen will now show Visual C# instead of Visual Basic.

Click Browse at the bottom of the screen to change Web Location, if necessary to get the screen below.

Notice that my Web Locationis now different.

Select ASP.NET Empty project and click OK to get the screen below.

Right-click on the project name from Solution Explorer, then select Add->Add New Item to get the following screen.

Select Web Form, accept Default.aspx file, and click Add to get:

Click Design at the bottom left-hand of the window to show the following:

Edit the Default.aspx file (the home page for your site) to add the message "Greetings and Salutations. I will master ASP.NET in this course."

To do this, if necessary, click the Design button below the editing window to switch to Design view, then click in the editing window and type " Greetings and Salutations. I will master ASP.NET in this course." (without the quotes) to get the following screen.

Click the Save button on the toolbar to save the changes to Default.aspx.

STEPs 4–5: Start Debugging; NOTE: Citrix users have different steps!

3. To ensure that everything is working properly, click the Start Debugging button on the toolbar, or press the F5 key on the keyboard, or pull down the Debug menu and select Start Debugging.

Save and run by Right-Click-> Run from Browser.

Press Yes.

Click the Start Debugging button on the toolbar, or press the F5 key on the keyboard, or pull down the Debug menu and select "Start Debugging."

Notice that this time the project build and website validation started.

If the Debugging Not Enabled dialog box appears, select the option to add or modify the Web.config file to enable debugging and click OK. You should only have to do this the first time you debug the site.

You will get a clean run just as you did previously. Your output screen looks like the screen below.

NOTE: To execute the application, you have these options:

• If you are using Citrix, press CTRL + F5 to Start Without Debugging. You will not be deducted points for this part.
• If you are using a standalone version, press F5 to Start with Debugging, or you can press CTRL + F5 to Start Without Debugging.

Create the Salary Calculator Form

1. Right click on the Project name. Choose Add, then Select Web Form to get the screen below.

And you get the Add New Item screen, shown below.

2. Select the name of the form you will add frmSalaryCalculator.aspx. Make sure "Place code in separate file" is checked and "Select master page" is unchecked.

You will create a Web-based salary calculator on this new page.

Click the Design view.

Add the Tools Window using View-> Toolbox.

3. You can choose to adjust the ToolBox to tab with Solution Explorer to look like the following screen.

You will create a Web-based salary calculator on this new page.

To do this, open the aspx page in Design view and, from the Toolbox, drag a label into the form, click after the label and add about 5 spaces, then drag a textbox control after the label.

Press Enter after the textbox to put the cursor on the next line.

Add another label and textbox below the first set and press Enter.

Then add a button control. Finally, on the last line, add another label. Your form should look like the screen displayed below.

4. If necessary, add the Property Window as shown in the screen below, using View->Properties Window.

5. Now we will modify the page to add proper labels and give the textboxes names.

• Change the text displayed in each label so that the first label displays Annual Hours; the second label should display Rate; and the third label should display $.
• To change the text displayed, click on the label control. This causes the property window to show all properties of the label, then change the Text property of the control in the Properties window.
• Set the ID property of the top textbox to txtAnnualHours.
• Set the ID property of the second textbox to txtPayRate. Set the ID of the bottom label (the one we set the text property to "$") to lblAnnualSalary. (Note: We set these IDs as we will be accessing the control values from the C# code. You can set the button ID and the other two labels' ID properties as well, but we won't be accessing them from our code.)
• Change the button text to display Calculate Salary. (Hint: To change the text displayed as the button label, change the Text property of the button.) The ID of the button should be txtCalculateSalary.Your form should now look like the screen displayed below.

This code will be called each time the user presses the button. It is important to remember that code in the code behind page executes on the server, not on the user's browser. This means that when the button is pressed, the page is submitted back to the Web server and is processed by the ASP.Net application server on the Web server. It is this code (between the { and } in this method) that will execute on the server. Once it is done executing, the page will be sent back to the browser. Any changes we make to the page or controls on the page will be shown to the user in the updated page.

• In this method, add code that will get the text in the txtAnnualHours text box, convert it to a Double, and store it in a double variable.
• Add code that will get the text from the txtPayRate text box, convert it to a Double, and store it in another variable.
• Create a third variable of type Double and set its value to the annual hours variable value multiplied by the rate double variable value.
• Take this resulting value and convert it to a string (text), and update the lblAnnualSalary Text property with this new string.

Let's look at a similar example. After reviewing this example, write the code needed to calculate the annual salary.

CostOfRoom Calculator is the alternate example, which demonstrates the skills you need to complete this assignment. See video at the top of this lab document and screenshots below.

What follows is an example of code-behind the Calculate button for the CostOfRoom Calculator:

Code-behind the calculate button

protectedvoid btnRoomCalculator_Click(object sender,EventArgs e)
 {
 //Declare variables to be used to extract data and perform calculations.
 double length=0.0; //Will hold the numeric value of length from text box
 double width=0.0; //Will hold the numeric value of width from text box
 double area=0.0; //Will hold the calculated value of area
 double perimeter=0.0;//Will hold the calculated value of the perimeter
 double diagonal=0.0; //Will hold the calculated value of the diagonal
 double cost=0.0; //Will hold the calculated value of cost for the room
 double costPerSquareUnit=15.0; //Will hold the numeric value of cost per unit text box.
 //Extract values from the texboxes
 length=Double.Parse(txtLength.Text);
 width=Double.Parse(txtWidth.Text);
 costPerSquareUnit=Double.Parse(txtCostPerSquareUnit.Text);
 //Perform calculations using the numeric variables, which now hold values from text boxes.
 area= length* width;
 perimeter=2.0*(length+ width);
 diagonal=Math.Sqrt(length* length+ width* width);
 cost= area* costPerSquareUnit;
 //Display results by assigning values to labels on the form.
 lblArea.Text="Area of the Room: "+ area.ToString("N"); //N - Formats the number.
 lblPerimeter.Text="Perimeter of the Room: "+ perimeter.ToString("N");//N - Formats the number.
 lblDiagonal.Text="Diagonal of the Room: "+ diagonal.ToString("N");//N - Formats the number.
 lblDiagonal.Text=" Cost of the Room: "+ cost.ToString("C"); //C - Formats for currency.
 } 

A control's property can be accessed by simply using the control ID followed by a . followed by the name of the property. For example, the value stored in the Text property of the txtAnnualHours control can be accessed by using this: txtAnnualHours.Text. Text properties on controls are of type string.

The output of the CostOfRoom calculator is shown in the screen below with Length, Width, Cost Per Square Unit labels and input boxes, and the Calculations button.

Use small values for length and width.
Use large values for length and width and see the formatting of the output.

To convert a string to a Double you can use the Convert class. If we had a string variable called str1 and a double variable called myNumber, the C# code to convert this would be as follows:

When converting from one type to another, we are assuming that the value stored in the type being converted is compatible with the type with which we are converting. In the example above, if the value stored in str1 was not a type compatible with a Double (for example, tiger), an error would be raised.

All of the base types in C# (double, int etc) have a ToString() method that you can call. If you had a double variable that you wanted to convert to a string and set that string to my label's text, you would do the following:

This would take whatever value was stored in the myNumber Double and convert it to a string.

Set your new form as the start page by clicking once on the form name in the Solution Explorer and then right-clicking on the form name and selecting Set as Start Page. You can now test your application and make sure it works correctly as you did with the Hello World form above. You can switch back and forth between which form runs when you run your application by setting the different forms as the start page. The final result should look something like the screen below with the Annual Hours, Pay Rate, Calculate Salary button, and result.

Once you have verified that your project works, save your project, zip all files, and submit in the Dropbox.